We offer barrel threading and porting services starting at $39.99. Most standard barrel threads of 1/2x28 are just $39.99. plus the cost of shipping it back to you. We also offer shortening, resizing, and porting. Please see photos #4 & 5 for the before and after of a 16" AR barrel as it was cut to a length of 7.5", resized, ported and threaded. Also, you do not have to be an FFL to ship to us or to have it shipped back to you. We offer more threads as well, please call us with questions or a quote on your specific threading needs. You ship us your barrel and we will call you when it is ready and you can pay over the phone by credit card for the labor and return shipping. Please call for details.